It makes it possible for people to borrow who otherwise couldn't borrow.

这样那些不能通过别的方式,筹到钱的人可以如愿以偿

耶鲁公开课 - 金融市场课程节选

The emperor in the east was able to do that because they were not conquered by the barbarians, but in the West, you have this situation where nobody is fully in charge.

东方帝王之所以能够如愿以偿,是因为他们没有受到野蛮人的入侵,但是在西方,你面临的情形是,没有人负有完全的责任

耶鲁公开课 - 古希腊历史简介课程节选